Process of making carriage-curtain knobs.



F. A. NEID W. HAFER. PROGESSOP MAKING G IAGB CURTAIN KNOBS.

IIIIIIIIIIIIIIIII 0T. 26, 1908.

921, 147-. Patented May 11, 1909.1

'onrrnn sTATEsEggnNr onrion FRED A. NEIDER AND WILLIAM HAFER, OF AUGUSTA, KENTUCKY, ASSIGNORS TO THE F. A. NEIDER COMPANY, OF AUGUSTA, KENTUCKY, A CORPORATION OF KENTUCKY.

PROCESS OF MAKING CARRIAGE-CURTAIN KNOBS.

Specification of Letters Patent.

Patented May 11, 1909.

To all whom it may concern."

Be it known that we, FRED A. NEIDER and WILLIAM HAFER, citizens of the United States of America, and both residents of Augusta, county of Bracken, State of Kentucky, have invented certain new and useful Improvements in Processes of Making Carriage-Curtain Knobs, of which the following is a specification.

Our invention relates to ap rocess for making carriage curtain knobs, which consist of a base and a neck of wrought metal having an axial bore, ,through which extends the shank of a nail whose head forms the head of the carriage curtain knob.

The object of our invention is a process by means of which the amount of metal required to make the neck is diminished, and the drilling operation is reduced. 7

In the accompanying drawings, we have illustrated the blanks in the various forms which they assume in our operation.

Figure l is an elevation of the blank cut from a wire for forming the neck. Fig. 2 is a sectional view of the same after it has been headed. Fig. 3 is a view similar to Fig. 2, after the same has been swaged. Fig. 3 is a View similar to F ig. 3, afterthe blank has been drilled. Fig. 4 is a sectional view of the completed knob. Figs. 5 and 6 are views showing the swaging operation.

In the first step of our process a blank, such as shown in Fig. 1, is cut from a wire. Then the blank is compressed in an ordinary heading machine to form a base, a. In this operation, likewise, axial indentations, a, a

' are formed in the ends of the blank, which is then placed in a female die, B, which has a recess, the upper edge, I), of which is of a diameter equal to the base, a, of the blank. From the part, b, the recess tapers at an angle similar to the tapered part, c, of the neck to be formed, to a part, b, which is of a diameter equal to the reduced end, a of the blank, A. Co-acting with the female die, is a male die, D, which has a cone-shaped end, d, of a size equal to the cavity, 0, in the blank, C. The blank, A, having been placed in the recess, 5, axiallybeneath the cone, d, the male die is lowered and presses the neck, a downward into the part, b, of the recess in the female die and spreads the metal of the blank, A, outward to the form of the recess in the female die. By this operation the length of the blank, A, is increased, so that the blank, C, of a length suflicient to form the neck of a carriage curtain knob is formed from a short blank, A, thus saving material. The blank, C, is then drilled to form the central bore, 0 The amount of metal to be drilled in the blank, C, is less than one-half what would have to be drilled in a blank of solid metal of the length of the blank, C. The bore, 0 is made of a size such as to be a driving fit for the shank,

e, of the capped nail, whose head, E, forms the head of the completed knob.

What we claim is:

1. A process of forming a blank containing the base and neck of a carriage curtain knob, and consisting of heading a short rod to form the base, forming a tapering cavity in the base by forcing the metal thereof outward so as to elongate the blank and form both the neck and the external tapering portion joining the base and neck.

2. The process of forming a blank for a carriage curtain knob containing the base and neck of the knob. from a headed metal blank consisting in forming a tapering cavity in the base or headed end by forcing the metal thereof outward so as to elongate the blank and form both the neck and the tapering portion joining the base and the neck and drilling the neck in alinement with the tapering cavity to form the bore for receiving the shank of the knob.

3. A process of forming a carriage curtain knob consisting of forming the base and the neck thereof from a headed metal blank by pressing a cavity into the headed end of the blank and causing the displaced metal to lengthen the blank, drilling the blank axially to form a bore, and driving the shank of a nail through the bore so that the head and shank of the nail form the head and shank of the knob.

FRED. A. NEIDER. WILLIAM I-IAFER.

Witnesses:

ME A. FIELD, LEO G. ONEILL. 

